| 摘要 |
<p>In a power supply system (10) for power switches (12,14) arranged in a totem pole configuration, a single power supply (32), having an output voltage substantially less than a voltage (V+) applied to an upper one (12) of the power switches, periodically charges a capacitor (28) within a flying capacitor circuit (26,28). Microprocessor based control circuitry (16) controls charging and discharging of the capacitor (28) and periodic operation of the power switches (12,14) resulting in the voltage at an output of the power switches (12,14) being at system common or at the voltage (V+) applied to the upper power switch (12).</p> |
